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51	51	* Micro SIM card slot for NB-IoT SIM
52	52	* 8500mAh Battery for long-term use
53	53
	54	+
54	54	== 1.3 Radar probe specification ==
55	55
56	56
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64	64	* Vertical Angel: 23°
65	65
66	66
	68	+
67	67	== 1.4  Storage Temperature ==
68	68
69	69
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87	87	* Sewer
88	88	* Bottom water level monitoring
89	89
	92	+
90	90	== 1.6  Specification ==
91	91
92	92
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104	104	* B20 @H-FDD: 800MHz
105	105	* B28 @H-FDD: 700MHz
106	106
	110	+
107	107	== 1.7  Installation ==
108	108
109	109
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340	340	* (% style="color:#037691" %)**Timestamp: **(%%)0x6390453d =1670399293 (Unix Time)
341	341
342	342
	347	+
343	343	== 2.4  Payload Explanation and Sensor Interface ==
344	344
345	345	=== 2.4.1  Device ID ===
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361	361
362	362	Specify the software version: 0x64=100, which means firmware version 1.00.
363	363
364		-For example 0x00 64 : This device is NMDS200 1 with firmware version 1.0.0.
	369	+For example 0x00 64 : This device is NDS03A 1 with firmware version 1.0.0.
365	365
366	366
367	367	=== 2.4.3  Battery Info ===
368	368
369	369
370		-Check the battery voltage for NMDS200.
	375	+Check the battery voltage for NDS03A.
371	371
372	372	Ex1: 0x0B45 = 2885mV
373	373
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392	392	**99**    Not known or not detectable
393	393
394	394
395		-=== 2.4.5  Distance ===
	400	+=== 2.4.5  Disalarm: (default: 0) ===
396	396
397	397
398		-[[image:1670407401682-959.png]]
	403	+(% style="color:blue" %)**If Disalarm = 1**(%%), NDS03A will only send uplink at every TDC periodically. This is normally use for pulse meter application, in this application, there are many open/close event, and platform only care about the total number of pulse.
399	399
400		-(% style="color:blue" %)**Object1 Distance:**
	405	+(% style="color:blue" %)**If Disalarm = 0**(%%), NDS03A will send uplink at every TDC periodically and send data on each open/close event. This is useful for the application user need to monitor the open/close event in real-time.
401	401
402		-Distance between sensor probe to the first object. (unit: cm)
	407	+ (% style="color:red" %)**Note:**(%%) When Disalarm=0, a high frequently open/close event will cause lots of uplink and drain battery very fast.
403	403
404		-For example, if the data you get from the register is 0x02 0x05, the distance between the sensor and the measured object is
405	405
406		-(% style="color:blue" %)**0205(H) = 517 (D) = 517 cm.**
	410	+=== 2.4.6  Keep Status & Keep Time ===
407	407
408	408
409		-(% style="color:blue" %)**Object2 Distance:**
	413	+Shows the configure value of Alarm Base on Timeout Feature
410	410
411		-Distance between sensor probe to the second object. (unit: cm)
412	412
	416	+=== 2.4.7  Timestamp ===
413	413
414		-=== 2.4.6  Timestamp ===
415	415
416		-
417	417	Timestamp : 0x6315537b =1662342011
418	418
419	419
	422	+=== 2.4.8  Switch Dual Channel Mode ===
	423	+
	424	+
	425	+NDS03A can connect two door sensors. Another door sensor can be connected to PB15 pin. Both channels support alarm function.
	426	+
	427	+
420	420	== 2.5  Downlink Payload ==
421	421
422	422
423		-By default, NMDS200 prints the downlink payload to console port.
	431	+By default, NDS03A prints the downlink payload to console port.
424	424
425	425	[[image:image-20221021111414-18.png]] ​
426	426
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437	437
438	438	* (% style="color:#037691" %)**Reset**
439	439
440		-If payload = 0x04FF, it will reset the NMDS200
	448	+If payload = 0x04FF, it will reset the NDS03A
441	441
442	442	* (% style="color:#037691" %)**INTMOD**
443	443
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447	447	== 2.6  ​LED Indicator ==
448	448
449	449
450		-The NMDS200 has an internal LED which is to show the status of different states.
	458	+The NDS03A has an internal LED which is to show the status of different states.
451	451
452	452	* When the device starts normally, the LED will light up for 1 second.
453	453	* After NDS03A join NB-IoT network. The LED will be ON for 3 seconds.
454	454	* For each uplink probe, LED will be on for 500ms.
455	455
	464	+== 2.7  Alarm Base on Timeout ==
456	456
457	457
458		-== 2.7  Distance alarm function ==
459		-
460		-
461	461	NDS03A can monitor the timeout for a status change, this feature can be used to monitor some events such as door opening too long etc. Related Parameters are:
462	462
463	463